Merge pull request #65 from shawnps/patch-2

fix typos

groupcache.go

@@ -146,13 +146,13 @@ type Group struct {
  cacheBytes int64 // limit for sum of mainCache and hotCache size
 
  // mainCache is a cache of the keys for which this process
- // (amongst its peers) is authorative. That is, this cache
+ // (amongst its peers) is authoritative. That is, this cache
  // contains keys which consistent hash on to this process's
  // peer number.
  mainCache cache
 
  // hotCache contains keys/values for which this peer is not
- // authorative (otherwise they would be in mainCache), but
+ // authoritative (otherwise they would be in mainCache), but
  // are popular enough to warrant mirroring in this process to
  // avoid going over the network to fetch from a peer. Having
  // a hotCache avoids network hotspotting, where a peer's